Abstract
ABSTRACT The new family Chongichthyidae is based on Chongichthys dentatus n. gen. et sp. from the Oxfordian marine deposits of the Domeyko Range, southeast of Antofagasta, northern Chile. Chongichthys dentatus differs from other Late Jurassic teleosts of South America and Europe in having: fenestrae between the prootic, auto-sphenotic and pterotic, and between the basioccipital, exoccipital, prootic and parasphenoid; a prootic fenestra; a large basisphenoid; a small, elongate basioccipital; a distinctive lower jaw; wide supraneurals; epineurals fused to the neural arches; ribs on the first abdominal centra and a distinctive enlargement of the last pleural ribs. The family Chongichthyidae shows some morphological similarities to elopiforms, pachyrhizodontoids, clupeomorphs, osteoglossomorphs and euteleosts, but it also differs from all of them in certain respects and is therefore regarded as Teleostei incertae sedis.
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